Here are
my first expermiments with using non visual band filters on a
planet to reveal potentially hidden details. Two images on the
top are from the first night, where I was able to first take
a standard color shot with my 12.5" and 2x barlow of Jupiter
at about 9pm. To its right I added a very dark and opaque Hoya
R72 infrared filter in the path. My web cam has been modified
to allow full spectral range and shows a direct comparison of
RGB and IR. The seeing improved dramatically in IR. Note the
moon Io of to the left. The contrasts and details in the belts
are much clearer in IR as well.
Now for the bottom
set of images taken on the next evening, we started first with
a standard color image of Jupiter seen on the left. Seeing was
a bit worse this night. On the right is a real startling image
without the barlow for more light with my brand new Schuler UV
standard filter. (300 - 400nm) The web cam would NOT see the
image at all with the brightness turned all the way up because
the image is very dim, and the web cam auto exposes up to only
about 1/15 second. I then employed my Meade DSI Pro black and
white hi res CCD camera, (also I pulled the blocking filter for
full response) and a long 2 second exposure. About 8 frames were
integrated of 2 seconds each during the exposure sequence.
The appearance
in UV light is hard to comprehend, but we are seeing various
levels of methane clouds in the atmosphere. A very different
appearence from the white light view.
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